termsql converts text from stdin or any file into an SQLite database table and allows users to execute SQL queries on that table, all in just one line on the command line. It can be used to sort, display, convert, extract, and modify data on the command line using syntax familiar to those who know SQL.

Directory Explorer is a terminal based file manager based on Midnight Commander. It allows mouse and keyboard navigation, has two panels that allow you to do two tasks at a time, and includes a text editor.

ng-jackspa is a set of simple user interface programs that host a LADSPA plugin, providing JACK ports for its audio inputs and outputs, and dynamic setting of its control inputs through the user interface. Additionally, the plugin controls can be exported to or controlled by control voltages on standard JACK audio ports. The following interfaces are available: an ncurses visual (full screen) interface for the terminal; a GTK+ graphical interface; a Qt 4 graphical interface; and a command line interface for the terminal.

Termdebug is a set of utilities for recording and replaying the input and output of terminal programs. Its main goal is to aid in developing and debugging terminal programs. Other programs such as termrec/termplay, nethack-recorder/player, and script/scriptreplay only record the output. However, when debugging an interactive terminal program, the input is often as important as the output.

KeyBox is a Web-based SSH console for executing commands and managing multiple systems simultaneously. It allows you to share terminal commands and upload files to all your systems. Once the sessions have been opened you can select a single system or any combination on which to run your commands. Also, additional system administrators can be added and their terminal sessions and history can be audited.

yetris is a Tetris clone which runs on the terminal. It has colors and high scores, along with many features found on modern Tetris implementations. It's made with C and runs on (most) Linux terminals.